juko | 6dbd1f24db297eb95d07468532edfa6d0d16d215304ac63f3a384b1b03b6d264

General

Target
2026-09-01_0ab5e2b462745bdeac549d72f78d4f87_elex_wannacry.exe
Size 69KB
Sample260901-1tsh3seh98
SHA256 6dbd1f24db297eb95d07468532edfa6d0d16d215304ac63f3a384b1b03b6d264
MD5 0ab5e2b462745bdeac549d72f78d4f87
SHA1 a73c4e43e395095a05839ae44208fe6a00cb0965
SHA512 c2091c242220653822cc0e2641c33fd36fdb3d5fc330fd5bc883e1650645b706e83c4c5f7a9d5d269f017f507e6d5f7650cd8bb1e214b87b26e19895a5d68a68
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9x:tLy2Kerc64CiGIm1K851YOhqYBwEM9x
TLSH
T1E163F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery execution juko persistence trojan

Malware Config

Signatures

Family: Juko
Juko is a trojan written in C++.
trojan juko

Detects Juko 2 IoCs

resource	yara_rule
behavioral2/files/0x000700000000697a-4.dat	family_juko
behavioral2/files/0x0007000000016b5e-10.dat	family_juko

Executes dropped EXE 2 IoCs

pid	Process
5252	WINWORD.exe
2924	WINWORD.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-189034102-168398478-1159367937-1000\Software\Microsoft\Windows\CurrentVersion\Run\WINWORD = "C:\\Users\\Admin\\AppData\\Roaming\\Mozilla\\WINWORD.exe -r"	WINWORD.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 1 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
4688	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2026-09-01_0ab5e2b462745bdeac549d72f78d4f87_elex_wannacry.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 4 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
872	PING.EXE
4568	PING.EXE
4688	cmd.exe
6008	PING.EXE

Runs ping.exe 1 TTPs 3 IoCs

Remote System Discovery

T1018

pid	Process
4568	PING.EXE
6008	PING.EXE
872	PING.EXE

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1796 wrote to memory of 5252	1796	2026-09-01_0ab5e2b462745bdeac549d72f78d4f87_elex_wannacry.exe	89
PID 5252 wrote to memory of 4688	5252	WINWORD.exe	90
PID 4688 wrote to memory of 6008	4688	cmd.exe	92
PID 4688 wrote to memory of 872	4688	cmd.exe	93
PID 4688 wrote to memory of 4568	4688	cmd.exe	94
PID 4688 wrote to memory of 2924	4688	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\2026-09-01_0ab5e2b462745bdeac549d72f78d4f87_elex_wannacry.exe
"C:\Users\Admin\AppData\Local\Temp\2026-09-01_0ab5e2b462745bdeac549d72f78d4f87_elex_wannacry.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1796
- C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
  "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" -r
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:5252
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 2&del "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe"&ping 127.0.0.1 -n 2&rename "C:\Users\Admin\AppData\Roaming\Mozilla\000015F6" WINWORD.exe&ping 127.0.0.1 -n 2&"C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Suspicious use of WriteProcessMemory
    PID:4688
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:6008
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:872
  - - C:\Windows\SysWOW64\PING.EXE
      ping 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:4568
  - - C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
      "C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe" \r
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:2924

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

000015F6

Path C:\Users\Admin\AppData\Roaming\Mozilla\000015F6
Size 69KB
SHA256 1a1aed59226a7205dd9aef723ed43fbff89d8ffcf3fa6144eb8862fb324ed268
MD5 ebf5083c92cbe664474880e075001ae4
SHA1 caef2e0b98791f7af395fe84cad85450d9678cb0
SHA512 ae8aa28a4b9105f4072ab22b999967247d7fee0fffbedaeef3961dc26807a6bc3f8a14e17e956917f24a93d5b9c85aba82d9b063df673724b72ba1338a58037e
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM98:tLy2Kerc64CiGIm1K851YOhqYBwEM98
TLSH
T14C63F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

WINWORD.exe

Path C:\Users\Admin\AppData\Roaming\Mozilla\WINWORD.exe
Size 69KB
SHA256 6dbd1f24db297eb95d07468532edfa6d0d16d215304ac63f3a384b1b03b6d264
MD5 0ab5e2b462745bdeac549d72f78d4f87
SHA1 a73c4e43e395095a05839ae44208fe6a00cb0965
SHA512 c2091c242220653822cc0e2641c33fd36fdb3d5fc330fd5bc883e1650645b706e83c4c5f7a9d5d269f017f507e6d5f7650cd8bb1e214b87b26e19895a5d68a68
SSDEEP 1536:tLsF2Kerc64sTiX2IV0DpK8SE9nYOhoQ6YBwEM9x:tLy2Kerc64CiGIm1K851YOhqYBwEM9x
TLSH
T1E163F70737A4A1E1D0A35270E8660B649B37ECB19A73A2077B94771D1DB2A41CF31B9B
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads